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1 Brindha, K.; Pavelic, Paul; Sotoukee, T. 2019. Environmental assessment of water and soil quality in the Vientiane Plain, Lao PDR. Groundwater for Sustainable Development, 8: 24-30. [doi: https://doi.org/10.1016/j.gsd.2018.08.005]
Environmental impact assessment ; Water quality ; Water pollution ; Water resources ; Drinking water ; Water levels ; Groundwater ; Faecal coliforms ; Bacteria ; Biological contamination ; Chlorides ; Nitrates ; Soil quality ; Soil sampling ; pH ; Sewage ; Land resources ; Filtration / Lao People's Democratic Republic / Vientiane Plain
(Location: IWMI HQ Call no: e-copy only Record No: H048891)
A water and soil quality baseline study was carried out across the ~ 4500 km2 Vientiane Plain in Lao PDR. Eight water quality and nine soil parameters were analysed using field kits at 95 sites in March 2015. Elevated electrical conductivity and chloride were apparent at two sites due to geogenic leaching from the marine rock-salt present in some areas. Groundwater was acidic in most locations. Nitrate and faecal contamination were also observed from nitrogenous fertilizers (diffuse) and from leaky sewage pits (localised) respectively. Soil quality is neither nutrient deficient nor does it pose a threat to plant growth. Where groundwater is used for drinking, removal of bacterial contamination by simple filtration or boiling is sufficient. In the absence of a functional monitoring network in the Vientiane Plain, periodic surveys of this kind should be performed. The results should be made widely available to the relevant government departments and other stakeholders for better management of the land and water resources.
2 Pavelic, Paul; Sikka, Alok; Alam, Mohammad Faiz; Sharma, Bharat R.; Muthuwatta, Lal; Eriyagama, Nishadi; Villholth, Karen G.; Shalsi, S.; Mishra, V. K.; Jha, S. K.; Verma, C. L.; Sharma, N.; Reddy, V. R.; Rout, S. K.; Kant, L.; Govindan, M.; Gangopadhyay, P.; Brindha, K.; Chinnasamy, P.; Smakhtin, V. 2021. Utilizing floodwaters for recharging depleted aquifers and sustaining irrigation: lessons from multi-scale assessments in the Ganges River Basin, India. Colombo, Sri Lanka: International Water Management Institute (IWMI). 20p. (Groundwater Solutions Initiative for Policy and Practice (GRIPP) Case Profile Series 04) [doi: https://doi.org/10.5337/2021.200]
Groundwater management ; Groundwater recharge ; Aquifers ; Floodwater ; Water use ; Groundwater depletion ; Groundwater irrigation ; Sustainable use ; Groundwater flow ; Transfer of waters ; Flood control ; Groundwater table ; Water storage ; Water quality ; Pumping ; Technology ; Pilot projects ; Assessment ; Risk management ; Cost benefit analysis ; Stakeholders ; Community involvement ; Socioeconomic aspects ; Livelihoods ; Food security ; Irrigated farming ; Environmental impact ; River basins ; Ponds ; Wells ; Monsoons ; Rain ; Drought / India / Ganges River Basin / Ramganga Basin / Uttar Pradesh / Rampur / Jiwai Jadid
(Location: IWMI HQ Call no: IWMI Record No: H050171)
(3.67 MB)
Pragmatic, cost-effective, socially inclusive and scalable solutions that reduce risks from recurrent cycles of floods and droughts would greatly benefit emerging economies. One promising approach known as Underground Transfer of Floods for Irrigation (UTFI) involves recharging depleted aquifers with seasonal high flows to provide additional groundwater for irrigated agriculture during dry periods, while also mitigating floods. It has been identified that there is potential for implementing the UTFI approach across large parts of South Asia. The first pilot-scale implementation of UTFI was carried out in a rural community of the Indo-Gangetic Plain in India, and performance of the approach was assessed over three years from a technical, environmental, socioeconomic and institutional perspective. The results are promising and show that UTFI has the potential to enhance groundwater storage and control flooding, if replicated across larger scales. The challenges and opportunities for more wide-scale implementation of UTFI are identified and discussed in this report. In areas with high potential for implementation, policy makers should consider UTFI as an option when making decisions associated with relevant water-related development challenges.
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